I give this drama an 8 for the first half and a 3 for the second because everything becomes stupid. It's pretty unbelievable that the writers are able to create such an engaging story and then turn it into a marathon of stupidity.

Kim Moo Young is built up to be a cold, manipulative, incredibly intelligent sociopath with a sex appeal up the wazoo. He doesn't care about anyone's feelings and shamelessly uses poor Seung Ah as a recreational activity cuz he can. He plays her like a drum while the plot slowly develops his feelings for Jin Kang through playful banter, meaningful conversations, and flirting. His bad-boy charm, cunningness, and insanely good looks are the highlight of the show. Unfortunately, all of this intelligence goes *poof* in the second half leading to some very stupid choices.

The drama's biggest let down is the characters' motivations, actions, and incomprehensible consequences based on those motivations and actions. Everyone hates Moo Young's lack of empathy. But, Yoo Jin Kang has no problem spending time with him while he dates Seung Ah all the while preaching sanctimonious b*llshit about morals. Later on, she unapologetically lies to her brother and goes on dates with her hot boyfriend behind oppa's back while preaching more sanctimonious bs. Oppa gets a little too high on his moral high horse about Moo Young's shenanigans and stabs him in the gut without regrets. It's even more asinine that he does not get arrested for assault/attempted murder or even get questioned after making a confession. Jin Kang throws a temper tantrum about her sexy boyfriend now having a hole in his belly, but doesn't seem to care that her brother is the culprit.

The murder mystery is the most interesting and complex storyline. But, it ends early with Im Yoo Ri's character being largely unutilized while the writers decide to bore us with the childhood trauma plotline, and characters preaching morality and acting illogically. Moo Young transforms from clever and observant to gullible and reactionary. He believes Jang Se Ran's atrocious story, the same Ms. Jang who is an insane sociopath and the least likely to tell the truth, and hastily makes a life altering decision leading to very tragic consequences. Special "thanks" to the genius who decided to make a tertiary character like Ms. Jang into a central plot device. She is an attractive and calculating older woman who is the head of a conglomerate. So, it's totally believable that she would fall for someone like Moo Young, who has no special skills, talent, or money, and then make him a CEO. And that's because Moo Young's biggest asset is dat ass.

Moo Young and Jin Kang have some very spicy chemistry on screen. But, the best thing about the drama is acting. Seo In Guk was made for this role. He wasn't just playing Kim Moo Young. He was Kim Moo Young.

The ending is tragic, but who cares, because everything! is! stupid!